US5511831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-centering, self-seating, double-sealing, interference fit tube joint
Assignee: Modine Manufacturing Co
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Filing: 1994-12-16
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Granted: 1996-04-30
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Expires: 2014-12-16
Abstract
Abstract The step of soldering, brazing, or welding a tube joint may be eliminated in a tube joint construction that includes a male tube member (10) having a first cylindrical section (14) of relatively lesser diameter and an adjacent, second cylindrical section (18) of relatively larger diameter. Also included is a female joint element (12) having an internal passage (30) which includes an emerging cylindrical section (32) of a diameter just less than the relatively larger diameter and an adjacent, interior cylindrical section (34) of a diameter just less than the relatively lesser diameter. The male tube member (10) is interference fitted into the female joint element (12) to provide a sealed joint without the need for soldering, brazing, or welding. A back-up seal in the form of an adhesive bead (38) may be disposed at the tapered end (28) of the female joint element (12) if desired.
Inventors
- 👤 Bobby L. Barton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:48
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/10; F16L37/00; F16L37/02; F28; F28F; F28F9/00; F28F9/26; Y; Y10; Y10S; Y10S285/00; Y10S285/915
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
A tube joint comprising: a male tube member including a first cylindrical end of relatively lesser diameter and an adjacent, second cylindrical section of relatively larger diameter; a female joint element having a flared end and an internal passage including an emerging cylindrical section of a diameter just less than said relatively larger diameter and an adjacent, interior cylindrical section of a diameter just less than relatively lesser diameter; said male tube member being interference fitted into said female joint element, and a bead of adhesive about said male joint element and said flared end of said female joint element.
Claim 2
Dependent Claim
100 words
A tube joint comprising: a male tube member including a first cylindrical end of relatively lesser diameter and an adjacent, second cylindrical section of relatively larger diameter; a female joint element having a flared end and an internal passage including an emerging cylindrical section of a diameter just less than said relatively larger diameter and an adjacent, interior cylindrical section of a diameter just less than relatively lesser diameter; said male tube member being interference fitted into said female joint element, and a bead of adhesive about said male joint element and said flared end of said female joint element.
Claim 3
Dependent Claim
15 words
The tube joint of claim 1 wherein said female joint element is a tube end.
Claim 4
Dependent Claim
29 words
The tube joint of claim 1 wherein said female joint element has an end surface whereat said passage emerges; said passage, at its interface with said surface, being flared.
Claim 5
Dependent Claim
34 words
The tube joint of claim 1 wherein first and second cylindrical sections are connected by a frusto-conical section and said emerging cylindrical section and said interior cylindrical section are joined by a frusto-conical surface.
Claim 6
Dependent Claim
21 words
The tube joint of claim 4 wherein the cone angles of said frusto-conical section and said frusto-conical surface are the same.
Claim 7
Dependent Claim
166 words
A self-centering, self-seating, double-sealing, interference fit tube joint comprising: a first tube of circular cross section and terminating in a stepped end of two differing diameters with the smallest diameter being immediately adjacent the end and with the two diameters being separated by a tapered section; a second tube of circular cross section and terminating in a flared end about a stepped internal passage of two differing diameters with the larger diameter being immediately adjacent the flared end, the differing diameters of said passage being separated by a tapered surface and being slightly smaller than the corresponding diameters of said stepped end; the tapers of said tapered section and said tapered surface being complementary; said first tube stepped end being received in said second tube stepped internal passage in interference fit relation to form a joint sealed at each of said diameters with said tapered section being seated against said tapered surface; and a back-up seal between said first and second tubes at said flared end.
Claim 8
Dependent Claim
166 words
A self-centering, self-seating, double-sealing, interference fit tube joint comprising: a first tube of circular cross section and terminating in a stepped end of two differing diameters with the smallest diameter being immediately adjacent the end and with the two diameters being separated by a tapered section; a second tube of circular cross section and terminating in a flared end about a stepped internal passage of two differing diameters with the larger diameter being immediately adjacent the flared end, the differing diameters of said passage being separated by a tapered surface and being slightly smaller than the corresponding diameters of said stepped end; the tapers of said tapered section and said tapered surface being complementary; said first tube stepped end being received in said second tube stepped internal passage in interference fit relation to form a joint sealed at each of said diameters with said tapered section being seated against said tapered surface; and a back-up seal between said first and second tubes at said flared end.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-04-30 | 1999-10-30 | 2000-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-30 | 2003-10-30 | 2004-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-30 | 2007-10-30 | 2008-04-30 | $7700.00 | Window Closed / Lapsed |